Join TSR now and get all your revision questions answeredSign up now
    Offline

    1
    ReputationRep:
    This is driving me insane . why do some of the hexaaqua ions have two colours?

    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by laurawoods)
    What's going on in pg 64?
    It explains why the hexaaminecobalt(III) ion, despite being yellow in colour, appears to darken a straw solution of hexaaminecobalt(II) upon oxidation.
    Offline

    0
    ReputationRep:
    (Original post by erniiee)
    It explains why the hexaaminecobalt(III) ion, despite being yellow in colour, appears to darken a straw solution of hexaaminecobalt(II) upon oxidation.
    Hmm that's what I was talking about?
    Offline

    0
    ReputationRep:
    (Original post by Chewy29)
    This is driving me insane . why do some of the hexaaqua ions have two colours?

    Posted from TSR Mobile
    EXAMPLE?
    Offline

    0
    ReputationRep:
    (Original post by Hart1995)
    Do we need to know all the definitions within thermodynamics? There seems to be a lot :/ WAAAA

    Posted from TSR Mobile
    It's not hard to learn those definitions, just think in your head an eqaution which corresponds to that def...this will make it much easier.
    Offline

    2
    ReputationRep:
    I know this is going to sound pretty bad but how are people learning colour changes for metal aqua ions? Struggling to remember them obh...

    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by laurawoods)
    Hello , my rules have no fault!

    But this question doesn't work because you cannot have two oxidations! It has to be one oxidation and one reduction happening simultaneously, hence the term redox.

    Check the question again, is my suggestion.

    And, I don't understand by what you are saying in red.
    :rolleyes: Sorry, I copied the question out incorrectly!

    Is this correct? (Edit - My handwriting is really small, tried to write as big and clearly as possible )

    Spoiler:
    Show
    Name:  photo.jpg
Views: 132
Size:  506.1 KB
    Offline

    1
    ReputationRep:
    (Original post by F_shakeey)
    I know this is going to sound pretty bad but how are people learning colour changes for metal aqua ions? Struggling to remember them obh...

    Posted from TSR Mobile
    I've had to just write them out over and over again and make flip cards with them on, repetition was the only way I could get them to sink in!
    Offline

    0
    ReputationRep:
    (Original post by F_shakeey)
    I know this is going to sound pretty bad but how are people learning colour changes for metal aqua ions? Struggling to remember them obh...

    Posted from TSR Mobile
    I am literally listing every single colour and its relevant metal aqua ion thingy and constantly repeating them, you notice there is a pattern amongst the M2+ and M3+ aqua ions.
    Offline

    2
    ReputationRep:
    (Original post by JenniS)
    I've had to just write them out over and over again and make flip cards with them on, repetition was the only way I could get them to sink in!
    (Original post by I have a question)
    I am literally listing every single colour and its relevant metal aqua ion thingy and constantly repeating them, you notice there is a pattern amongst the M2+ and M3+ aqua ions.
    I see, thanks guys I think you're right. The best way is just writing them down so they stick in your head. I'll be doing that today :yep:

    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by I have a question)
    :rolleyes: Sorry, I copied the question out incorrectly!

    Is this correct? (Edit - My handwriting is really small, tried to write as big and clearly as possible )

    Spoiler:
    Show
    Name:  photo.jpg
Views: 132
Size:  506.1 KB
    oxidation numbers look ok but where are the protons and electrons?
    Offline

    2
    ReputationRep:
    I was hating on the redox equilibria section of the NT book..but it isn't actually so bad!
    Offline

    0
    ReputationRep:
    (Original post by laurawoods)
    oxidation numbers look ok but where are the protons and electrons?
    Right hand side of the page, I've added the electrons, I don't think I need to add any protons.

    Bottom of the page (in green), I've merged the equations for iodine and the sulphur containing compound.
    Offline

    0
    ReputationRep:
    (Original post by I have a question)
    Right hand side of the page, I've added the electrons, I don't think I need to add any protons.

    Bottom of the page (in green), I've merged the equations for iodine and the sulphur containing compound.
    You need to look through my step by step rules once more....The iodine one looks ok but have a look at the other one again!
    Offline

    0
    ReputationRep:
    (Original post by laurawoods)
    You need to look through my step by step rules once more....
    :emo:

    Spoiler:
    Show

    Name:  Question 1b.jpg
Views: 98
Size:  42.1 KB
    Name:  photo.jpg
Views: 98
Size:  506.1 KB


    The mark scheme says I'm correct, but okay I'll go through the rules again. Thanks laurawoods.
    Offline

    0
    ReputationRep:
    (Original post by F_shakeey)
    I see, thanks guys I think you're right. The best way is just writing them down so they stick in your head. I'll be doing that today :yep:

    Posted from TSR Mobile
    Hello, did your class do experiments with the transition metal ion complexes? If your class did those expts , then it genuinely would be so easy to think back to what colour things were and what happened when different ligands etc were added! For example: hexaaqua for cobalt is that neat pink colour and for copper it is that beautiful blue colour etc... Just trying to remember or learn parrot fashion doesn't help. But if you think back to the experiments and what the different test tube reactions looked like, then hey presto suddenly it becomes very easy and yeah neat! Hope that helps!
    Offline

    1
    ReputationRep:
    It feels sooooo good to have unit5 revision out of the way wohoooo just past paper practise now
    Offline

    1
    ReputationRep:
    I have my empa tomorrow, its such a blag.

    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by Chewy29)
    I have my empa tomorrow, its such a blag.

    Posted from TSR Mobile


    Yeah same, not too sure what to prepare for the practical part of the paper. All I've done is learnt all the basic chemical tests for what will probably be task 2. Not too sure what else I can prepare for tomorrow?
    Offline

    1
    ReputationRep:
    (Original post by wittyguy)
    Yeah same, not too sure what to prepare for the practical part of the paper. All I've done is learnt all the basic chemical tests for what will probably be task 2. Not too sure what else I can prepare for tomorrow?
    I've done the practical, only have my written left to do but I dont know what to revise except for the few blatantly obvious topics.
 
 
 
Poll
Which pet is the best?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.